Which of the following is NOT a permissible paving material under Rule 310?

• A. Asphaltic concrete
• B. Concrete pavement
• C. Rubberized asphalt
• D. Milled asphalt

Answer: (D)

The selected answer indicates that milled asphalt is not a permissible paving material under Rule 310. This is correct because Rule 310 specifically governs standards related to dust-generating operations, which include requirements for paving materials to ensure that dust emissions are minimized during construction and maintenance activities.

Milled asphalt, which is created by grinding up existing asphalt surfaces, can potentially generate more dust than other types of paving materials when it is used in a manner that does not adequately control emissions. This characteristic may lead to increased dust pollution in comparison to the other options. Within the context of the rule, permissible paving materials like asphaltic concrete, concrete pavement, and rubberized asphalt are generally regarded as having lower dust emissions, making them compliant with the environmental standards outlined by Rule 310.

Thus, the distinction lies in the dust-generating potential of milled asphalt versus the benefits provided by the other materials, which contribute to better air quality management in areas where construction and paving take place.